Obeka, Splitter of Seconds + Time Sieve + Replicating Ring

Obeka, Splitter of Seconds

Time Sieve

Replicating Ring

How it works

1. At the beginning of your upkeep, Replicating Ring triggers, putting a night counter on it. Then, if it has eight or more night counters, remove all of them and create eight Replicating Ring tokens.
2. Deal combat damage using Obeka. Obeka triggers, causing you to get at least seven upkeep steps after this phase.
3. Repeat step 1 for each of the additional upkeep steps.
4. Activate Time Sieve by tapping it and sacrificing five Replicating Ring tokens, causing you to take an extra turn after this one.
5. Repeat each turn.

This dazzling engine centers around Obeka, Splitter of Seconds, whose menace helps her slip past blockers to deal combat damage and violently multiply your upkeep steps. Those cascading upkeeps do double duty: they feed Replicating Ring to rapidly accumulate night counters and flood your board with eight Replicated Ring tokens once the threshold is met, supplying a steady stream of artifact sacrifices. You then cash in those tokens to fuel Time Sieve, sacrificing five of them to chain together infinite extra turns.